Conduit-coupling.



H. KRANTZ.

CONDUIT COUPLING.

APPLICATION FILED 001.1111907.

898,75 1, Patented sept. 15, 1908.

3 SHEETS-SHEET l.

H. KRANTZ.

GONDUIT GOUPLING.

APPLICATION FILED ocmw, 19,07.

898,751 Patented Sept. 15, 1908.

3 SHEETS-SHEET 2.

H. KRANTZ.

CONDUIT COUPLING. v*APPLICATION MLPD 00T.18,1907.

898,751. Patented sept.15,1908.

3 SHEETS-SHEET 3.

l'llillllt'l" FRA'NTZ, OF NEW YORK, N. Y.

CONDUIT--COUPLING.

No. 898,751. ,I

Sp ecifcation of Letters Patent.

Patented Sept. 15, 1908.

.Application filed October 18, 1.907.` Serial No. 398,086.

7o all 'whom it may concern.'

Be it known that I, IlUnn'r KRANTZ, a

' 1s a plan ol'l the blank from wlnch the coupcitizen of the l'nitedStat-es, residing at borough oi Brooklin, city and State ol' New York,have invented certain new and useful Improvements m Conduit -(,ouplmgs,of:

which the following is t clear, full, and exact description.

The object ol' this invention is to provide an improved coupling lorelectrical conduit sections which will occupy the mininum space, behidden from view in the completed installation and which may be4eliiciently and readily caused to perform its coupling functio.. b mereinsertion ol" tbe coupling into a conduit section.

In carrying out this invention I provide on the coupling body at one endat least, a rcsilient extension carrying a hook, and on the conduit.section for engagement with the hook I provide a recessed portion,preferably in the form of a slot cut entirely through the body of tbecasing. I also prefer to provide means either in the. coupling or on oneol` the conduit sections to maintain the parts when coupled,. in rigidposition relative to each other. I prlr that such coupling be made of asingle piece of sheet metal stamping, or mainly of a single piece.

My improved coupling may serve to connect straight sections or sectionsat any angle to each other, where the conduit is to 'be coupled at anangle with its open face toward the room or towards ceiling or floor, infact any location of connection may be availed of in using the couplingof my invention.

The scope of my invention will be pointed out in the claims.

In the accompanying drawings Figure 1 is a perspective View of acoupling according to this invention, adapted for connecting twostraight conduit sections. Fig. 2 is a section on line 2--2 Fig. 3showing two sections f joined by the coupling of Fig. 1. Fig. Si is aplan view partly broken away of F ig. 2. Fig. 4 is a section on line 4 4Fig..5. Fig. 5 is a plan view partly broken away showing one form ol` Tconnection. Fig. 6 is a pers cctive View partly broken away showing t iecoupling ol' two sections at right angles to cach other. Fig. 7 is aperspective View of the coupling of Fig. 6. Fig. 8 is a section on line8-8 Fig. 6. t) is a perspective View partly broken away ol two angleconnections where the location of the open face is at right angles tothat ol Fig. 6. Fig. l()

ling of Fig. 1 may be formed. Fig. 11 is a plan of theA blank from whichthe coupling of Fig. 7 may be formed. Fig. 12 is a plan of the blankfrom which the coupling of Fig. 9 may be formed. Fig. 13 is aperspective i view ol the blank )f`.Fig. 12 when formed into shape. Fig.14 is a perspective view of a finishing piece which may or may not beAused in conjunction with the shaped coupling of Fig. 13 and Fig. 15 isa plan of the blank from which said inishing piece may be made.

.f".s shown in the drawings Figs. 1 to 3 inclusive, the couplingcomprises a body formed of a single sheet metal stamping shown in planin Fig. l() and shown bent into shape in Fig. 1. It consists of twooppositely extending vextensions 1 each provided with a depending hook 2at its extreme end. Side plates 3 stand up at right angles. to the eX-tensions 1 preferably being joined centrally with the extensions l butextending for some distance as detached wings tree from said extensions.The height of the side plates 3 should be equal to the insidemeasurements of the conduits 4 between their bottom 5 and the overturnedledges 6. In coupling the sections 7 and 8 together, the coupling mayirst be inserted into section 7 until the left hand hook 2 comesopposite to the slot 9 formed across the bottom 5 of such section whenit willspring into place due to its resiliency which may be increased ifdesired by slightly bending the extension down between the hook and thejunction of the extension with the body part. When once sprung intoplace, unless the hook be raised the coupling and section will berigidly connected for the upstanding plates 3 and extensions l form atrough like structure, snu glytting the interior of the conduit. Thesecond section 8 may now be inserted overthe free end of the couplinguntil the hook 2 of the right hand end engages the slot of thc section8, then, as will be obvious, both sections will be joined iirmlytogether and held against longitudinal or side-wise pull.

In the modification shown in Figs. 4 and 5 where connection is desiredat an angle to a straight length of conduit section, coupling may bemade by riveting a T coupling 10, as by a rivet 11, to the conduit 40,after cutting through its wall and turning outwardly the lugs 13l formedout of the side of the conduit 40. The T coupling 10 may carry a Asideplate 12 to give rigidity to the same. The ugs or wings 13 as shown inFig. 4 may eX- tend from the bottom to top of conduit section 15 to giverigidity thereto. Section 15 is provided with a slot 16 to be engaged bythe hook of the coupling in like manner to the connections beforedescribed. Where a conduit meets at a'corner of a room and it is desiredto have the open face of the same face outwards a coupling such 'asshown in Figs. 6, 7, 8 and 11 maybe made use of. -The sections 15 and 16may be cut to fit the angle and provided with slots 17 such as beforedescribed. The coupling consists of side plates 18 struck out of themetal at right angles and extensions 19' withthe usual hooks so bentinto right angled position as shown graphically in Fig. 7. The couplingWill be effected by first inserting the couplin in one section and thenforcing the secon section at right angles thereto over that half ofthecoupling which extends freely in that direction.

The modification illustrated in Fig. 9 and in Figs. 12 to 14 is forjoining two sections for instance, whereV one runs vertically in a roomand the other horizontally where it is desired to have the open face ofthe conduit face the room. In'this case the coupling may be struck upfrom a blank shown in Fig. 12 where the side wall 30 is onelon0r stripbent up as shown in Fig. 13 and its lfree end 31 Abrought around intothe position shown.

Lugs 82 to form opposite side plates are also bent up as shown. 'Theextensions 34 and their hooks 35 are substantially like those beforedescribed but are cut out at right angles to each other in the blank asshown 1n ig. 12. y

The device of Fi 13 may be used as shown im that re 1f desired and goodservice secured. .f desired however and in order to get a more finishedappearance with greater strength, an angle plate 36 may be riveted tothe lugside plates 32.

I claim as my invention 1.1In combination; two conduit sections l havingan open face and turne over edges,

having their ends in substanti l contact, a l

c ouplin' of approximately the cross sectlonal shape o the conduitwithin the conduit sections and means for securing said coupling toeachconduit section.

2. In combination,y two conduit sections having an open face and turnedover edges, havingtheir ends in substantial contact, a couplingofapproximatel" the cross sectional shape of the conduit Within theconduit sections and means for securing said coupling to each conduitsection, said means.

comprising a hooked member on the coupling, and a recess into which saidhooked member may enter -in the conduit, said hooked member extending asa plain sheet from thatportion of the coupling which is of the aproximate cross section ofthe conduit.

4. Iin combination, two conduit sections in substantial contact one withthe other so as to provide a continuous trough throughout the two, acoupling entirely within the two sections and spring means adapted tolock'said coupling in place, said coupling lying against the inner wallof the conduit sections, whereby an open trough is preserved.

5. In combination, two conduit sections in substantial contact one withthe other so as to provide a continuous trough throughout the two, acoupling entirely within the two sections and spring means adapted tolock said coupling in place, said coupling lying against the inner wallof the conduit sections, whereby an open trough is preserved, theconduit having turned over edges and an open face, the coupling having afiat bottom plate of the width of the conduit and upstanding sides ofthe height of the conduit. Y Signed at Brooklyn New York this 16th dayof October 1907.

HUBERT KRANTZ.

